1. mildewproof - Adjective
2. mildewproof - Verb
mildewproof (comparative more mildewproof, superlative most mildewproof)
Resistant to mildew.
mildewproof (third-person singular simple present mildewproofs, present participle mildewproofing, simple past and past participle mildewproofed)
(transitive) To make resistant to mildew.